Interstellar (2014)

aychamo_aycono_sl said:

I love this movie. But the thing I never understood was how they go from planet to planet to planet in possibly different systems at the blink of an eye without going back into hyper sleep

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I was under the impression that the planets were all in the same system. Still doesn't explain the years it would take to get to those planets, you are correct.

Yeah same system. Maybe they do go to sleep and just don't show it. I also assumed they were pretty close together from the BH's pull

One last thing...wouldn't the debris surrounding the black who be super heated? I mean to star temps?

There's been plenty written on the science behind it. Most of it is sound but they did take some liberties for dramatic effect. Some things that seem like that must be the case are still grounded in science, though. Like the falling into the black hole bit. It is possible on extremely large black holes to pass the event horizon where there isn't a staggering amount of gravity. This prevents spaghetti-fication death and prevents the outside observer effect that is caused by gravity (like the rest of the film's time dilation). I don't remember what exactly causes the photons to form an event horizon further out. Magnetic fields, maybe? Point is, the science behind everything in the movie (correct and incorrect) has been written about over and over again. Can find it with minimal digging, I'm sure.

Enob_sl said:

There's been plenty written on the science behind it. Most of it is sound but they did take some liberties for dramatic effect. Some things that seem like that must be the case are still grounded in science, though. Like the falling into the black hole bit. It is possible on extremely large black holes to pass the event horizon where there isn't a staggering amount of gravity. This prevents spaghetti-fication death and prevents the outside observer effect that is caused by gravity (like the rest of the film's time dilation). I don't remember what exactly causes the photons to form an event horizon further out. Magnetic fields, maybe? Point is, the science behind everything in the movie (correct and incorrect) has been written about over and over again. Can find it with minimal digging, I'm sure.

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I might be misunderstanding which part you don't really remember, but it's not a lack of gravity that prevents spaghettification, it's that the ratio of gravity from one side of your body to the other isn't so large that the front end gets pulled in with a much greater force than the back end (which is why it's only "possible" to enter a supermassive black hole and not a regular old one...It seems a bit counter intuitive, but the more massive the black hole, the more even the pull of gravity across your body). So there is no issue with photons and event horizons; they still act the same as they would in a regular black hole

Enob_sl said:

There's been plenty written on the science behind it. Most of it is sound but they did take some liberties for dramatic effect. Some things that seem like that must be the case are still grounded in science, though. Like the falling into the black hole bit. It is possible on extremely large black holes to pass the event horizon where there isn't a staggering amount of gravity. This prevents spaghetti-fication death and prevents the outside observer effect that is caused by gravity (like the rest of the film's time dilation). I don't remember what exactly causes the photons to form an event horizon further out. Magnetic fields, maybe? Point is, the science behind everything in the movie (correct and incorrect) has been written about over and over again. Can find it with minimal digging, I'm sure.

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Too bad all the science behind the movie didn't help make it a good movie.

Brahma_sl said:

One last thing...wouldn't the debris surrounding the black who be super heated? I mean to star temps?

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I assume you're talking about the accretion disk? It was there:



It acted as the "sun" for the planets.

Ambiturner_sl said:

I assume you're talking about the accretion disk? It was there:

It acted as the "sun" for the planets.

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Correct. But wouldn't they need to cross that plane to actually enter the black hole? How would that be possible without being burned to a crisp.

Brahma_sl said:

Correct. But wouldn't they need to cross that plane to actually enter the black hole? How would that be possible without being burned to a crisp.

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I'm throwing this out there expecting someone with more knowledge to correct it

I never thought of that, so now it's got me thinking about the planets. Since this is a supermassive black hole and there is an accretion disk at the equator, is it possible that the rate of spin keeps most of the heat radiating from the equatorial part?

If you think about the planets: The first planet is a temperate water world, but is so close it has massive time dilation. The ice planet must be farther away, and the desert planet at the end is close since it is hotter, but not so close that they would mention time dilation.

So in guessing that the spin of the black hole forces it to expel heat closer to the equator? Ice planet is far away, temperate planet is extremely close to cause time dilation, but is currently rotating near the colder poles. Arid world is near the equator of Gargantua, getting a lot of light and heat.

The only thing that still gets me the whole movie is how Anne Hathaway's speech about love and whatnot. I don't hate the speech, but if it would have been replaced by a sound argument, they never would have went to the Ice planet. "Your husband is there, that's why you want to go." Anne: "No you idiots, it's closer to Gargantua, so given the choice of temperature extremes, the hotter planet with lots of solar power we can use for energy is a smarter choice. The other planet is probably very cold, doesn't get enough sunlight to power our stuff, and probably doesn't get enough light to grow plant life. Black science guy here lived on the station for 22 years. We have enough supplies to last years until we find a reliable water source."

Brahma_sl said:

Correct. But wouldn't they need to cross that plane to actually enter the black hole? How would that be possible without being burned to a crisp.

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You actually could never enter a black hole and live, supermassive or otherwise. You are correct, in that the accretion disk surrounding an event horizon is super heated, but not to star temperatures, but to millions of degrees, so even from a far, far distance, any spacecraft (or person) would be disintegrated. Also, yes it is true that in a supermassive black hole the gravity is more spread out so if theoretically you could get through the accretion disk your ride wouldn't be as volatile, the "spaghetti effect" would still occur as you entered the event horizon (the part of your body or ship that enters first would be pulled at significantly harder than the back part). Also, most astrophysicists now believe that inside the event horizon is a "fire wall" where all the super heated material falling into a black hole literally forms a wall of fire as big as the event horizon itself, which obviously can't be seen outside of the black hole because the light can't escape (but makes a lot of sense since the material falling into the black hole is millions of degrees Fahrenheit). So really, there wouldn't be an actual scientific way to enter a black hole and survive (even leaving out all the stuff that happens inside of a black hole which scientists have only assumptions).

etchazz_sl said:

Also, yes it is true that in a supermassive black hole the gravity is more spread out so if theoretically you could get through the accretion disk your

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Not true. You could get pretty far past the event horizon in a black hole as massive as Gargantua before spaghettification occurs.

Ambiturner_sl said:

Not true. You could get pretty far past the event horizon in a black hole as massive as Gargantua before spaghettification occurs.

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My point was, the spaghettification does occur, even in a super massive black hole, which means even if you somehow survived the whole way to that point, you're still fucked.

It's my understanding that a spinning black hole would indeed have magnetic poles. That's how they radiate and decay. And they do indeed radiate but it is at such a rate as to be imperceptible. They will, eventually, be the hottest things in the universe. They will even, eventually, pop. They're supposed to release a lot of energy when they do as nuclear forces reassert themselves as dominant over gravitational ones.

And, according to Einstein, a black hole has to spin. Everything is in motion.


I mean that's why Hawking is famous, right? Hawking radiation. Without that he's just some physics professor with MS.